Bag making machine



NOV 3;, 1931. 5 COOPER BAG MAKING MACHINE 5 Sheets-Sheet 1 Filed Aug. 11

/W T ORNEY m CILLM a z 1 Z 1- 8 NOV. 3, 1931" 5, COOPER BAG MAKING MACHINE Filed Aug. 11', 1925 5 Sheets-Sheet 2 Illl INVENTOR Q'Z/MfiU QZ /T @ATTORNEY NOV- 3, 1931. COOPER I BAG MAKING MACHINE Filed Aug. 11, 1925 5 Sheets-Sheet 3 NOV. 3, 1931. s, COOPER BAG MAKING MACHINE s. COOPER 1,830,192

BAG MAKING MACHINE Filed Aug. 1 1925 5 Sheets-Sheet 5 Nov. 3, 1931.

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2 A Z 4 JEE VENTOR BY M 22 A TORNEY open side and Patented Nov. 3, 1931 UNITED STATES PATENT; OFFICE SIMON COOPER, OF BROOKLYN, NEW YORK, ASSIGNOR T0 COOPER TEA PACKET COM- PANY, OF BROOKLYN, NEW YORK BAG MAKING MACHINE Application filed August '11, 1925. Serial No. 49,663.

This invention relates particularly to the manufacture of flat rectangular bags of the type produced by folding over a section of cloth and then stitching the same along the across one end.

The usual method of producing such bags has been to make the blank for each bag separately and to complete the sewing in one handling with the stitching continuous along the side and across the bottom of the bag. This method necessarily involves certain delays and loss of time in stitching such seams, in the handling of the individual blanks and in changing from one blank to the next.

The principal objects of this invention are to produce a better and more uniform prodnet and to attain such results with practical,

cfiicient and relatively simple mechanism.

The drawings accompanying and forming part of this specification illustrate one of the practical commercial embodiments of the invention wherein the foregoing and other desirable objects are attained by means of certain novel features of construction, combination and relation of parts as set forth hereinafter, but it should be understood that the structure may be varied from this particular embodiment without departure from the spirit and scope of the invention as defined and broadly claimed herein) Figure 1 is a front elevation of the machine.

Figure 2 is a plan of several of the completed bags as they issue from the machine.

Figure 3 is a plan view of the machine with the rear portion of the same broken away for lack of space.

Figure 4 is a detached perspective view of v the first feed table.

Figure 4a is a similar v1ew of the segmented feed roll.

Figure 5. is a vertical cross sectional view of the machine as on substantially the. plane of line' 55 of Figure 1, showing in particular the shear for severing the bag lengths and the sewing machine for closing the ends of such lengths.

Figure 6 is a detached perspective view of the cooperating shear blades and their mountings.

drive segments 21 of the upper or active Figure 7 is a cross sectional view of the machine as on line 7-7 of Figure 1, showing in particular the feed belts and the segmental feed roll cooperating therewith.

Figure 8 is a horizontal sectional view as on substantially the planeof line 8-8 of Figure 1.

Figure 9 is 'a shear and feed-in mechanism.

The bag material is introduced into the machine at the right in Figures 1, 3 and 8 in the form of a flattened tubular strip 10,

woven in that shape or produced by doubling a length of cloth and stitching the edges together at 11. This strip is indicated in Figures 1 and 3 as passing-upward over guide rolls 12, 13 and thence downward between smoothing rolls 14, 15, the latter being tensioned againstthe first by a spring 15 acting on an arm 16 of shaft 17 on which is fixed an arm 18 carrying a pivot stud 19 on which the roll is journaled.

The feed of the tubular bag strip is effected in the illustration by a continuously rotating roll 20 having longitudinally separated peripheral drive segments 21, Figure 4a, cooperating with a roll 22'journaled in rock arms'23 on shaft 24 which has an upstanding arm 25 engaged by a spring 26. (Illide fingers 27 are shown entered between the drive segments portions of the fabric between such segments. As shown particularly in Figure 5, the lower or spring pressed feed roll 22 may be made in longitudinally separated peripheral sections in alinement and cooperating with tllile ro A feed table 28 is shown extending between the smoothing and feed rolls and this table is illustrated in Figure 4 as having a transverse slot 29 for the lower spring pressed smoothing roll and a series of slots 30 for the sections of the lower spring pressed feed roll;

As shown particularly in Figure 8, the bag strip intermittently advanced by the feedrolls passes between cooperating upper and lower shear blades 32, 33 which act at the proper .time to sever the material in bag lengths 34. The upper blade is shown ad1ustably secured broken sectional detail of the to guide and flatten outthe free by a clamp 35 to the end of a lever 36 mounted on a rock shaft 37 and actuated by means of a cam roll 38 engaging a cam 39 on shaft 40.

To maintain the shear blades in close cutting engagement, the lower blade is shown as having an upward projection 41 engaging the face of the upper blade at a point inward, clear of the transverse cut, Figures 5 and 6, and as spring tensioned against the upper blade by being carried at the end of a slide bar 42 engaged in a guide 43 and acted on by a spring 44. This lower blade is shown as adjustably held by an end clamp 45 and as adjustable vertically in its guide by means of screws 46 to vary the extent of overlap of advance them in the gage finger 41. This construction, it will be seen, serves to automatically maintain the blades constantly in proper cuttingrelation.

ghe'bag lengths are advanced by the feed ro s 47 which thus becomes a temporary support for the lengths severed by the shear. Over this table is disposed a segmental transferroll 48 timed to grip the severed bag lengths and between the upper and lower co-acting feed belts 49, 50, Figure 7.- These belts grip the bag lengths and carry the severed ends of the same past the sewing machine mechanism indicated generally at 51, Figure 8, which operates to stitch these ends closed, as indicated at 52, Fig. 2. This stitchspacing of the bags mg mechanism may be of any approved type and for this reason is shown diagrammatically in Figure 5, driven by belt 53.

To prevent the tail end of a bag length on the cross conveyers 49, 50 from interfering with the advance of the main strip being fed past the shears, the transfer roll 48 is shown as carrying a resilient wiper 54 at the end of its segmental portion, designed to push the lastcorner of the severed portion forwardly out of the path of the advancing strip. This transfer roll prevents the cross feed from interfering with the main feed and so by enabling both operations to proceed simultaneously, avoids any need for holding one operation to wait upon the other.

The cross feed belts 49 and 50 operate continuously and similarly the sewing mechanism operates continuously, stitching the bottom edgesof the advancing row of bag sections and connecting the-completed bags by a cable of stitching 55- which insures proper on the conveyers and assists in the handling of the bags as they are removed from the machine. -The bags as they come from the machine are ready for use and may be filled with this connecting cable intact, or if desired, they may be cut apart before bein put into service.' If desired, the tops 0 the bags may be closed while they are in the-machine or as they issue from the machine, by providing additional sewing mechanism positioned at the opposite over a transversely extending cross table side of the cross conveyers to act upon the top edges of the bags.

By thus maintaining the sewing machine continuously in operation, a maximum production and a uniformity of product are attained. The feeding-in rolls are timed to intermittent-ly advance the tubular bag strip while the cutoff blades are open, these blades are timed to sever the length as soon as it is fully advanced and the transfer roll is timed to advance the bag length to the cross conveyers the instant the cut is completed so that no time is lost at any of these stations. The clearing of the severed length from in front of the advancing main strip by the wiper of the transfer roll enables the mainand cross feeds to'be very closely timed.

The various parts of the machine are suit ably driven" in the proper timed relation and in the present disclosure, all from the one main shaft at the back of the machine, show ing at 56 in Figure 5. This shaft carries a pulley 57 for the lower feed belt 50 and a sprocket 58, Figure 7, carrying a chain 59 in engagement with a sprocket 60 on shaft 61. This latter shaft is shown as carrying a large gear 62 meshing with a pinion 63 on the transfer roll shaft 64 and the latter is shown as carrying a gear 65 in mesh with a pinion 66 on the cam shaft 40. This shaft is shown in Figures 1- and 3 as carrying a spiral gear 67 in mesh with a corresponding gear 68 on cross shaft 69, which latter is provided with a spur gear 70 driving the spur gear 71 on the shaft 72 of the feeding-in segment.

The gear 62, shown in Figures 3 and 7, also drives a pinion 73 on a shaft 74 carrying a pulley 75 for the upper feed belt 49. This belt is shown as passing also over an idler 76 and a roll is shown at 77 adjustably mounted in a slot 78 for taking up slack in the belt. Similarly, provision is made for slack in the lower belt 50 by adj ustably supporting the pulley 79 for the forward end of the lower belt in a slotted bracket 80 at the front of the machine and providing a bolt 81 for shifting such pulley. Guide rolls are indicated at 82, 83 for supporting the upper run of the lower belt in close engagement with the lower run of the upper belt, c'aus- 'ing the lower belt to conform to the periphery of the upper belt pulley 75 so asto insure the bags being firmly gripped between the belts and carried positively past the sewing machine.

The driving arrangement disclosed is simple, direct and compact, the latter being an important feature of the invention, enabling the machine to be used where only comparatively small space is available. The smooth ing rolls, in addition to flattening and smoothing the tubular bag strip, place the strip under tension, enabling the feed rolls to accurately, and uniformly measure off the bag lengths. The cross conveyer usually vill be operated at greater linear speed than he longitudinal feed of the strip, thereby pacing the lengths sufliciently to prevent inerference' between them and to clear the last evered length away from the advancing end If the strip.

What is claimed is:

1. In a machine of the character disclosed, means for advancing strip material in one lirection, a conveyer operating transversely .0 said means, means for severing lengths of naterial advanced to said conveyer and means for shifting such severed lengths, on ;he conveyer clear of the end of the advancng strip, including a rotating resilient Wiper inger.

2. In a machine of the character disclosed, feed belts having opposed portions disposed in cooperating relations, a transfer roll positioned' to advance material into the bite of said belts, material severing means adjacent said transfer roll, means for intermittently advancing material past said severing means into position for'engagement by the transfer roll and a spring wiper carried by the transfer roll for shifting the severed lengths of material-out. of the way of the advancing strip of materiaL.

3. A bag making machine, comprising a- .table for receiving severed bag sections, means for intermittently depositing severed bag sections on said table, and a continuously-driven feed roll having a raised segment cooperating with the table to advance the successive severed sections laterally in relation to their initial movement.

4. A bag making machine, comprising a.

table for receiving severed bag sections, means for intermittently depositing severed bag sections on said table, a continuouslydriven feed roll having a raised segment cooperating with the table to advance the successive severed sections laterally in relation to their initial movement, and cooperating feed belts receiving the sections. from said feed roll and moving them with an edge exposed beyond the belt edges for side seam- -F A bag making machine, comprising a table for receiving severed bag sections, means for intermittently depositing severed bag'sections on said table, a continuouslydriven feed roll having a raised segment cooperating with the table to-advance the successive severed sections laterally in relation to their initial movement, cooperating feed belts receiving the sections from said feed roll and moving them with an edge exposed beyond the belt edges for side-seaming, and

means carried by said feed roll for shifting rearward portions of the severed sections out of the way of the advancing fabric tube.

6. A bag making machine, comprising means for intermittently advancing a flat fabric tube, shears for severing sections therefrom while at rest, a table for receiving the severed sections, and a continuously-driven feed roll having a raised segment cooperating with the table to advance the successive severed sections laterally in relation to their initial movement.

7. A bag making machine, comprising means for intermittently advancing a fiat fabric tube, shears for severing sections therefrom while at rest, a table for receiving the severed sections, a continuously-driven feed roll having a raised segment cooperating with the table to advance the successive severed sections laterally in relation to their initial movement, and cooperating feed belts receiving the sections from said feed roll and moving them with an edge exposed beyond the belt edges forzside-seaming.

8. A bag making machine, comprising means for intermittently advancing a flat fabric tube, shears for severing sections therefrom while at rest, a table for receiving the severed sections, a continuously-driven feed .roll having a raised segment cooperating with the table to advance .the successive severed sections laterally in relation to their initial movement, cooperating feed belts receiving the sections from said feed roll and moving them with an edge exposed beyond the belt edges for side-seaming, and means carried by said feed roll for shifting rearward portions of the severed sections out of the way of the advancing fabric tube.

9. 'A machine of character described, com

prising cooperating, continuously-driven feed rolls for advancing between them a strip of folded fabric, one roll having spaced raised segments for intermittently gripping the strip against the other roll and advancing it, stripping members extending into the spaces between said raised segments and shears operated during rest of the strip to sever sections therefrom.

10. A machine of character described, comprising cooperating, continuously-driven feed rolls for advancing between them a strip of folded fabric, one roll having spaced raised segments for intermittently gripping the strip against the other roll and advancing it, stripping members extending into the spaces between said raised segments and tension rolls anterior to the feed rolls and between which the strip passes.

'11. A machine of character described, comprising cooperating, continuously-driven feed rolls for advancing between them a strip of folded fabric, one roll having spaced raised segments for intermittently gripping the strip against the other roll and advancing it, the other of said rolls being yieldably mounted to permit gripping of materialpf unequal thickness, stripping members extending into the spaces between said raised segments and a strlp-supporting table arranged between the rolls and apertured to accommodate one strip against the other of the feed rolls,

whereby it contacts with the other roll.

12. A machine of character described, comprising cooperating, continuously-driven feed rolls for advancing between them a strip of folded fabric, one roll having spaced raised segments for intermittently gripping the strip against the other roll and advancing it, stripping members extending into the spaces between said raised segments, a swinging arm carrying one of the rolls, and a spring acting on said arm to cause resilient rollcontact.

13. A machine of character described, comprising cooperating, continuously-driven feed rolls for advancing between them a strip of folded fabric, one roll having spaced raised segments for intermittently gripping the roll and advancing it, stripping members extending into the spaces between said raised segments, a swinging arm carrying one of the rolls, and a spring acting on said arm to cause resilient rollcontact and tension rolls anterior to the feed rolls, one of said tension rolls being yieldably mounted to permit gripping of strips of unequal thickness passing betWeen-the rolls.

In testimony whereof I aflix my signature.

'SIMON COOPER. 

